JP5745628B2 - Fluid transfer device - Google Patents

Description

  The present invention relates to a fluid conveyance device that conveys a fluid (for example, a gas phase, an ultrafine liquid phase, an oily material, and the like) in a lump form to an arbitrary area (for example, indoors, outdoors, etc.), and in particular, a fluid conveyance The present invention relates to a driving device that performs the above and a fluid conveyance device including a signal generating device for driving the driving device.

  Conventionally, there is a fluid conveying means (for example, a vortex ring conveying device or an air cannon) that radiates fluid to an arbitrary area. As such, there is a known means for forcibly vibrating a molding box to transport a gas phase obtained by smoke or the like from an opening provided in a part of the molding box to a remote area. The means for performing such forced vibration has realized forced vibration of the molded box mainly by a human operation of “striking” the structure of the molded box itself.

  Moreover, as means having the same effect, there is an example in which an existing direct drive system speaker (speaker) for acoustic emission is used as it is for carrying by a fan or radiating an acoustic signal (for example, patent document) 1). Furthermore, a solenoid (a structure in which a metal wire is wound around a side surface of a cylindrical member in a coil shape and a magnet is arranged on the central axis of the cylindrical member) similar to the operation of a speaker is used as a conveying means. In some cases (for example, see Patent Document 2).

JP 2007-237803 A (FIG. 3) Japanese Patent No. 3675203 (FIG. 24)

  In the case of means for transporting fluid using an existing speaker for acoustic emission, the vibration and input signal form such as a diaphragm and a diaphragm support member which are components of the speaker are affected, and the diaphragm and diaphragm support member Will cause unnecessary vibration. In addition, the time required to attenuate the unnecessary vibration of the vibration plate and the vibration plate support member is long, so that the fluid cannot be quantitatively conveyed, and the fluid is conveyed in a direction different from the direction to be conveyed. There was a problem. In this case, a noise that is not necessary for conveyance (hereinafter referred to as an abnormal noise) is generated from the vibration plate or the vibration plate support member, which causes a problem of causing discomfort during use.

  In addition, when the fluid is transported to a remote area, it is necessary to greatly increase the vibration amplitude of the diaphragm. However, if the vibration plate is greatly increased in vibration amplitude, unnecessary vibration is generated in the diaphragm and the supporting material that supports the diaphragm. It becomes easy. For this reason, a desired amount of fluid cannot be transported in the correct direction, and the fact that the structure is not a dedicated transport means has also been affected, resulting in a cost problem. The same problem occurs when the solenoid is used as the conveying means.

  Furthermore, in the techniques as described in Patent Document 1 and Patent Document 2, it is not possible to transport a fluid in a plurality of directions at once or with a time difference, but only one in a relatively limited direction. There was also a problem that it was only possible to carry out the transfer.

  The present invention has been made to solve the above-described problems, and provides a fluid conveyance device capable of reliably conveying an appropriate amount of fluid in a determined direction without generating abnormal noise. Is.

A fluid conveyance device according to the present invention has a diaphragm for imparting a conveyance force to a fluid, generates a drive device that vibrates the vibration plate, and a signal that vibrates the vibration plate, and this signal is driven to A signal generation device to be sent to the device, the signal generation device including a rising wave component in the positive voltage direction , a falling wave component in the negative voltage direction, and a time including the rising wave component and the falling wave component And a maximum value is determined by a one-wave signal created at a creation time that is a total time of the rising wave component and the plus voltage portion of the falling wave component, and a voltage of ½ or less in the plus voltage direction. Each of the signals is generated as a waveform of one wave by the time-driven negative voltage braking wave component.

  According to the fluid conveyance device according to the present invention, it is possible to reliably convey an appropriate amount of fluid in the determined direction without generating abnormal noise.

It is a schematic sectional structure figure showing a schematic structure of a fluid conveyance device concerning Embodiment 1 of the present invention. It is a schematic diagram for demonstrating an example of the drive signal for driving the drive device produced | generated with the signal generator of the fluid conveying apparatus which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the motion of the drive device in the general signal waveform produced | generated by a signal generator. It is a graph which shows the characteristic example of the acoustic impedance measured in the state which mounted | wore the cabinet with the drive device of the fluid conveying apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of a noise characteristic when carrying out vortex ring conveyance using the drive device which performed the noise countermeasure. It is a schematic sectional drawing which shows schematic structure of the fluid conveying apparatus which concerns on Embodiment 2 of this invention. It is a general | schematic cross-section figure which shows schematic structure of the fluid conveyance apparatus which concerns on Embodiment 3 of this invention. It is a general | schematic cross-section figure which shows another schematic structure of the fluid conveying apparatus which concerns on Embodiment 3 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional structure diagram showing a schematic configuration of a fluid conveyance device A according to Embodiment 1 of the present invention. Based on FIG. 1, the fluid conveyance apparatus A is demonstrated in detail. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

  The fluid conveyance device A is configured to form a fluid (for example, a gas phase, an ultrafine liquid phase, an oily material, etc.) in a lump shape (vortex ring (ring shape)), and an arbitrary area (such as the fluid conveyance space shown in FIG. 1) indoors or outdoors. 1). For example, the fluid to be conveyed includes air containing water vapor. The fluid conveyance device A includes a driving device 100 and a signal generation device 170. The drive device 100 includes a vibration force generation unit, a vibration unit, and a cabinet 30 that houses them.

  The vibration part includes at least a diaphragm 16, a frame 20, a large arc damper (second elastic member) 21, and a large arc edge (first elastic member) 22. The vibration force generation unit includes at least a yoke 10, a center pole 11, a magnet 12, a plate 13, a voice coil 14, and a voice coil bobbin 15. The voice coil bobbin 15 and the diaphragm 16 are connected via an adhesive layer 17. Note that the vibration unit and the vibration force generation unit constitute a magnetic circuit unit 103.

  The yoke 10 is a plate-like member that constitutes the base of the vibration force generator. The center pole 11 is a columnar member molded at the center of the yoke 10. The magnet 12 is fixed to the outer peripheral side of the center pole 11 via a predetermined gap. That is, the yoke 10 fixes the center pole 11 and the magnet 12. Although the shape of the yoke 10 is not particularly limited, for example, a disk-shaped plate member or the like may be used. The magnet 12 is made of, for example, neodymium, samarium cobalt, ferrite, or alnico.

  The plate 13 is a plate-like member fixed to the upper surface of the magnet 12. The voice coil 14 inputs a signal for driving the driving device 100. The voice coil bobbin 15 is a substantially cylindrical member, and the voice coil 14 is wound around the outer peripheral surface. The winding width of the voice coil 14 (the contact area of the voice coil bobbin 15 of the voice coil 14) has an area that covers the outer peripheral surface of the voice coil bobbin 15 without limitation. The voice coil bobbin 15 is mounted on the center pole 11 and is electromagnetically driven with the magnet 12 by the input signal form and the input voltage applied to the voice coil 14, and the entire voice coil bobbin 15 vibrates (shown in FIG. 1). Vibrates left and right).

  The diaphragm 16 is mounted on the end surface of the voice coil bobbin 15 (the end surface opposite to the mounting surface with the center pole 11) via an adhesive layer 17. The diaphragm 16 may be a flat plate type, a cone type or a dome type which is a general speaker, but a flat plate type made of resin, metal or the like having high rigidity is desirable as a means for conveying a lump of fluid described later. . Further, since the fluid in the pressurized space 106 may be high-temperature (100 ° C. or higher) steam or may have erodibility such as aroma oil, the diaphragm 16 may be made of, for example, heat-resistant polypropylene or ABS material. And the like, and the surface of the substrate may be coated with an erosion resistant material such as silica.

  The adhesive layer 17 has a viscosity for fixing the diaphragm 16 to a fixed position of the voice coil bobbin 15. The frame 20 is a member having a substantially donut shape when seen in a plan view. The frame 20 includes a first fixing portion 20a, a second fixing portion 20b, and a tapered portion 20c that connects the first fixing portion 20a and the second fixing portion 20b. The first fixed portion 20 a is fixed to the fixed end 105. The second fixing portion 20 b is fixed to the upper surface of the plate 13. In addition, the 1st fixing | fixed part 20a, the 2nd fixing | fixed part 20b, and the taper part 20c which comprise the flame | frame 20 may be integrally formed, and may each be joined by welding joining etc. by another body. .

  The large arc damper 21 has a substantially donut shape when viewed in plan, and has one end connected to the outer peripheral surface of the voice coil bobbin 15 and the other end connected to the upper surface of the plate 13 toward the transport port 11 side. It is a curved member. The large arc damper 21 functions to hold the voice coil bobbin 15 at an arbitrary position on the plate 13 and the frame 20. The large arc edge 22 has a substantially donut shape when viewed in plan, and has one end connected to the upper surface of the first fixed portion 20a of the frame 20 and the other end connected to the upper surface of the outer peripheral portion of the diaphragm 16. Yes. The large arc edge 22 functions to hold the diaphragm 16 at an arbitrary position of the frame 20.

  In order to discharge a mass of fluid from a pressurizing space (corresponding to a pressurizing space 106 described later), it is necessary to generate a strong pressure fluctuation inside the pressurizing space, and a necessary conveyance distance and a strong pressure fluctuation are required. Experimental verification has shown that it is necessary to vibrate the diaphragm at least 10 mm or more inside the pressurized space in order to obtain Therefore, in the driving device 100, the large arc damper 21 and the large arc edge 22 each have a radius of 10 mm or more, and the diaphragm 16 and the voice coil bobbin 15 are brought into their respective stationary states by the action of the large arc damper 21 and the large arc edge 22. In comparison, vibration of 10 mm or more can be performed.

  Therefore, the large arc damper 21 and the large arc edge 22 are formed of a material having excellent elasticity such as synthetic rubber (for example, ethylene-propylene-diene rubber (EPDM)). As a result, the large arc damper 21 and the large arc edge 22 have appropriate elasticity, so that the large arc damper 21 and the large arc edge 22 are prevented from breaking even when the amplitude of the diaphragm 16 increases. Synthetic rubber is excellent in wear resistance. Furthermore, synthetic rubber is excellent in erosion resistance (specifically, oil resistance, heat resistance, cold resistance, ozone resistance, weather resistance, acid resistance, alkali resistance, etc.). Therefore, even if the fluid has an erodible component, erosion can be suppressed.

  The cabinet 30 includes a rear space 107 that is formed with the diaphragm 16 as a boundary and in which the magnetic circuit unit 103 of the driving device 100 can be installed, and a pressurization space 106 for storing a fluid that is conveyed as a vortex ring. It is a substantially box-shaped member. Further, the fixed end 105 is formed so as to protrude toward the inside at the facing portion of the inner wall of the cabinet 30. The first fixing portion 20a of the frame 20 is fixed to the upper surface of the fixed end 105 by any means (for example, a screw or an adhesive). The fixed end 105 may be configured by fitting a member separate from the cabinet 30 to the inner wall surface of the cabinet 30 or may be fixed to the inner wall surface of the cabinet 30 with a screw or an adhesive. It may be configured.

  The pressurizing space 106 is a space formed on the front side of the diaphragm 16 (the side that is not the connection side of the voice coil bobbin 15), and stores a fluid that is desired to be conveyed in a necessary direction. The pressurized space 106 has a predetermined volume corresponding to the amount of fluid for conveying the fluid as a vortex ring. Note that the inner wall surface of the pressurized space 106 may be coated with an erosion resistant material such as silica in preparation for the case where an erodible fluid such as aroma oil is diffused.

  On the other hand, the rear space 107 is a space formed on the rear surface side (connection side of the voice coil bobbin 15) of the diaphragm 16 and functions as a housing space in which the magnetic circuit unit 103 is disposed. Therefore, the rear space 107 has a volume enough to provide the magnetic circuit unit 103. However, it is assumed that the pressurization space 106 and the rear space 107 are not in communication and have no air permeability. That is, the pressurizing space 106 and the rear space 107 are partitioned by the fixed end 105 and the frame 20 and have no air connection.

  The cabinet 30 is formed with a carry-out port 110 having an arbitrary opening diameter that allows the outside and the pressurized space 106 to communicate with each other. Here, a state in which one carry-out port 110 is formed on the wall surface of the cabinet 30 at the position facing the diaphragm 16 (the wall surface on the right side in FIG. 1) is shown as an example. In addition, the number and formation position of the carry-out port 110 are not specifically limited. The opening shape of the carry-out port 110 is not particularly limited, but may be the same shape as the planar shape of the diaphragm 16, for example, a circle.

  The cabinet 30 is formed with an opening 120 having an arbitrary opening diameter that allows the outside and the rear space 107 to communicate with each other. By forming the opening 120, the outside and the magnetic circuit unit 103 are communicated with each other, and the movement of the diaphragm 16 is not suppressed. That is, the opening 120 functions to allow the vibration transmitted from the diaphragm 16 to the rear space 107 side to escape to the outside of the cabinet 30. Here, a state in which the opening 120 is formed on the wall surface of the lower surface of FIG. 1 is shown as an example. The opening shape of the opening 120 is not particularly limited, but may be, for example, circular. Needless to say, a vibration absorbing member that absorbs vibration may be provided on the inner wall surface of the rear space 107.

  The signal generator 170 includes at least a drive signal processing unit 150 and an amplifier unit 160. The drive signal processing unit 150 has a function of generating a signal for driving the voice coil 14. The amplifier unit 160 is connected to the subsequent stage of the drive signal processing unit 150 and has a function of amplifying the signal generated by the drive signal processing unit 150. The drive signal processing unit 150 generates a signal waveform as shown in FIG. The generated signal is transmitted to the voice coil 14 via the amplifier unit 160. As a result, a magnetic force is generated in the magnetic circuit unit 103, and the diaphragm 16 is driven by the magnetic force.

  The voice coil 14 is connected to the signal generator 170 via a signal line (not shown), and a current corresponding to a drive signal transmitted from the signal generator 170 flows. Thus, the voice coil 14 becomes an electromagnet, and the voice coil bobbin 15 wound around the voice coil 14 vibrates due to the force (magnetic force) obtained by interacting with the magnetic field generated by the magnet 12, and this vibration Is transmitted to the diaphragm 16 via the adhesive layer 17. As described above, in the fluid conveyance device A, the voice coil bobbin 15 is vibrated by the voice coil 14, whereby the diaphragm 16 is vibrated to form a vortex ring.

  However, the vibration of the voice coil bobbin 15 has various frequency components, and in particular, has a high frequency component that is not necessary for forming the vortex ring. This has caused mechanical vibration noise associated with the vibration of the drive device 100 itself.

  FIG. 2 is a schematic diagram for explaining an example of a drive signal for driving the drive device 100 generated by the signal generator 170. In FIG. 2, 200 is a rough signal waveform, 201 is a rising wave component, 202 is a falling wave component, 203 is between the rising wave component 201 and the falling wave component 202, and contributes to the fluid conveyance shape. The vortex ring creation time component T, 204 represents the braking wave component after the falling component, and 210 represents the maximum value of the rising component 201. When the rising wave component 201 and the falling wave component 202 are configured by a single wave component of a positive voltage, the braking wave component 204 is formed as a single wave of a negative voltage. The minus side voltage is set to a voltage equal to or less than ½ of the plus side voltage. Each single wave component is assumed to be one wave at a time.

  FIG. 3 is a schematic diagram for explaining the movement of the driving device 100 in the schematic signal waveform 200 generated by the signal generator 170. The movement of the driving device 100 will be described with reference to FIGS.

  As shown in FIG. 3, with the diaphragm 16 as a boundary, the non-driven state (stationary state = stationary position) is the original state, and the diaphragm 16 is reverse to the magnetic circuit unit 103 by supplying a positive voltage. This is referred to as front drive. That is, the diaphragm 16 is steeply driven in front by the rising wave component 201 according to the driving time described later. At this time, the large arc damper 21 and the large arc edge 22 can move to the front side by 10 mm or more at the maximum value 210. Next, the diaphragm 16 returns to the rest position by the driving time described later by the braking wave component 204.

  Therefore, in the fluid conveyance device A, the diaphragm 16 is moved by the positive component single waveform created by the drive signal processing unit 150, and the fluid existing in the pressurized space 106 is discharged from the carry-out port 110 to the outside of the cabinet 30 as a lump. It is possible. The fluid discharged at this time is discharged as a lump having a donut-like shape (abbreviated as a vortex ring) from the carry-out port 110.

  However, mechanical vibration components are not attenuated immediately. Therefore, the diaphragm 16 causes a slight vibration that repeats “rear surface driving” that moves to the magnetic circuit unit 103 side from the stationary position and the aforementioned “front surface driving” in a very short cycle. This slight vibration acts as a negative pressure that tries to return the vortex ring once exited from the carry-out port 110 to the pressurized space 106 again. For this reason, a brake-like operation for dulling the operation of the vortex ring in the middle of conveyance is caused. Therefore, in the fluid conveyance device A, in order to prevent such a brake-like operation, the braking wave component 204 is formed for the purpose of suppressing the resonance vibration of the driving device 100 including the diaphragm 16.

  When the diaphragm 16 is slowly returned to the stationary position, the falling wave component 202 also partially acts. On the other hand, the braking wave component 204 is a signal waveform for the purpose of forcibly returning the diaphragm 16 to the stationary position and attenuating resonance unnecessary vibration of the entire driving device 100. Therefore, the waveform of the braking wave component 204 can not only suppress the movement of the diaphragm 16 but also prevent unnecessary braking-like movement acting on the vortex ring discharged from the carry-out port 110. become.

  Further, BT shown in FIG. 2 represents the driving time of the braking wave component 204. The drive time BT is set to be equal to or less than the time of a frequency component equal to or less than Fo of the acoustic impedance characteristic when the drive device 100 is installed in the cabinet 30 (for example, 0.02 seconds for 50 Hz) (see FIG. 4 described later). . F0 will be described later.

An example of the drive signal will be further described.
In the fluid conveyance device A, in order to prevent the generation of abnormal noise from the driving device 100 (mechanical vibration noise accompanying vibration of the device itself), the fluid conveying device A is arranged between the voice coil bobbin 15 and the diaphragm 16 in configuring the driving device 100. The adhesive layer 17 is installed on the surface. The adhesive layer 17 plays a role of not transmitting the vibration of the electromagnetic component generated in the voice coil 14 to the diaphragm 16, so that the mechanical vibration noise component can be reduced.

  Furthermore, in the fluid conveyance device A, the drive device 100 is driven by the approximate signal waveform 200 created by the drive signal processing unit 150 in order to further reduce the abnormal noise accompanying the vibration of the drive device 100. The general signal waveform 200 dampens the dimensions of the vortex ring and the diaphragm 16, and further improves the driving state of the form of the vortex ring itself.

  FIG. 4 is a graph showing a characteristic example of acoustic impedance measured with the drive unit and the vibration force generation unit mounted on the cabinet 30. F0 (referred to as F-zero) shown in FIG. 4 matches the frequency when all the members constituting the driving device 100 vibrate (resonant state) at the same time. The sharpness of this F0 (Q (referred to as a cue)). It is possible to assume a resonance state of the driving device 100 by using it.

  The sharper the Q, the sharper the resonance of the member. The resonance time is represented by a resonance time wave Fm. The longer this Fm, the longer the resonance state continues. Further, the lower the F0, the lower the frequency that the human ear can not hear, and the lower the frequency, the smaller the recognition of abnormal noise. Furthermore, as Fm is shorter, unpleasant sensation with respect to abnormal noise is less likely to occur. That is, the longer the Fm, the longer the discomfort. Therefore, the lower the resonance frequency F0 and the shorter the resonance time wave Fm, the lower the influence on human hearing. However, if F0 is sufficiently low, there is little auditory discomfort even if Fm is somewhat long. Note that Q for obtaining an ideal Fm is 1 or more.

  From the above, it is necessary to control Fo and Fm in a state where the drive unit and the vibration force generation unit are mounted on the cabinet 30. Fo uses a low frequency of 50 Hz or less, which is a power supply frequency, as a frequency band with less auditory discomfort. Originally, there is no problem as long as the driving device 100 is driven at a low frequency. However, depending on the constituent material of the driving device 100 and the dimensions of the diaphragm 16, the driving device 100 may be driven at a frequency higher than 50 Hz. In that case, the resonance time wave Fm of the general signal waveform 200 generated in the drive signal processing unit 150 is only driven within a low frequency band.

The following (Formula 1) is a formula for determining the drive time (resonance time wave Fm).
(Formula 1) Fm = 1 / Hz
For example, if the frequency is 50 Hz, the driving time is 0.02S.

  An example of driving at 30 Hz regardless of the dimensions of the diaphragm 16 will be described. If it is 30 Hz, Fm is 0.03 S from the above (Formula 1). The time for reaching the maximum value 210 of the rising wave component 201 at this time is 0.005 seconds. The remaining 0.025 seconds are used as the falling wave component 202. In order to efficiently transport the “vortex ring” from the carry-out port 110 to the outside of the cabinet, it is necessary to consider the action due to the pressure fluctuation in the pressurized space 106 for the discharge from the narrow carry-out port 110. Therefore, in order to efficiently convey the fluid accumulated in the pressurized space 106 from the narrow outlet 110 provided in the large pressurized space 106 without being subjected to pressure fluctuations and remaining in the pressurized space 106, the following is performed. It is necessary to carry it out.

In order to reliably convey an appropriate amount of fluid in the determined direction without generating abnormal noise, it is necessary to consider the following (a) to (e).
(A) The diaphragm 16 is accelerated to push out the contents (fluid) in the pressurized space 106.
(B) Increasing the diameter of the vortex ring = the contents of the pressurized space 106 are not left.
(C) It takes time to return the diaphragm 16 to the rest position.
(D) The diaphragm 16 is braked so as not to cause unnecessary vibration.
(E) In consideration of discomfort caused by unnecessary sounds and use at night, it is desirable that all operations be silent.

  Therefore, in order to realize (a) to (e), in the fluid conveyance device A, the diaphragm 16 of the driving device 100 can be vibrated greatly by the large arc edge 22 and the large arc damper 21. The time of the rising wave component 201 provides the acceleration with respect to the diaphragm 16. The vortex ring creation time component T203 allows the contents of the pressure space 106 to be discharged out of the cabinet 30 from the pressure space 106 as a thick vortex ring without noise. In addition, the braking wave component 204 suppresses unnecessary vibration of the diaphragm 16, prevents unnecessary braking operation to the vortex ring, and further suppresses unnecessary vibration of the entire driving device 100, thereby preventing further braking movement. Is possible.

  In the waveform shown in FIG. 2, the vortex ring creation time component T203 forms the thickness of the vortex ring and has both sides as a measure against abnormal noise. This is consistent with the long drive time of the diaphragm 16. For example, when the vortex ring creation time component T is 0.001 S, the frequency is 1000 Hz, the time during which the ring is formed is very short, the frequency is also high, and an unpleasant noise is generated when the drive device is driven. To do. Therefore, in the fluid conveyance device A, driving with Fo of 50 Hz or less enables both noise countermeasures and reliable vortex ring conveyance in the determined direction.

  FIG. 5 shows an example of noise characteristics when the vortex ring is conveyed using the drive device 100 that has taken countermeasures against abnormal noise, with the solid line before the countermeasure and the broken line after the countermeasure. From FIG. 5, it can be seen that when the driving device 100 that has taken countermeasures against abnormal noise is used, the sound pressure level of noise is significantly reduced as compared with that before the countermeasure.

Embodiment 2.
FIG. 6 is a schematic cross-sectional structure diagram showing a schematic configuration of a fluid conveyance device B according to Embodiment 2 of the present invention. Based on FIG. 6, the fluid conveyance apparatus B is demonstrated in detail. The basic configuration of the fluid transfer device B is the same as that of the fluid transfer device A described in the first embodiment, but is different from the fluid transfer device A in that a plurality of driving devices 100 are provided. In the second embodiment, differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  The fluid conveyance device B is configured to be able to convey a lump of fluid in one or two or more directions simultaneously or with a time difference. As shown in FIG. 6, in the fluid conveyance device B, two drive devices 100 are installed in the cabinet 30. A partition wall 109 is provided between adjacent drive devices 100 (specifically, between adjacent large arc edges 22), and two drive devices 100 are installed. The opening 120 is shared by the two driving devices 100. Further, although not shown, the signal generator 170 is connected to each of the driving devices 100.

  According to such a configuration, the two vortex rings are connected to the cabinet by supplying the drive signals as shown in FIG. 2 of the first embodiment using the two drive devices 100 simultaneously or with a time difference. 30 can be discharged to the outside. For example, it is possible to radiate the vortex ring to the outside of the cabinet 30 by adding a time difference to the emission of the vortex ring by giving the drive signal a time difference by timer control. Moreover, the lump of fluid can also be conveyed in two or more directions by making the opening direction of the carry-out port 110 into different directions. In FIG. 6, the case where there are two drive devices 100 is shown as an example, but the number of installed drive devices 100 is not particularly limited.

Embodiment 3 FIG.
FIG. 7 is a schematic cross-sectional structure diagram showing a schematic configuration of a fluid conveyance device C according to Embodiment 3 of the present invention. FIG. 8 is a schematic cross-sectional structure diagram showing another schematic configuration of the fluid conveyance device C according to Embodiment 3 of the present invention. Based on FIG.7 and FIG.8, the fluid conveying apparatus C is demonstrated in detail. The basic configuration of the fluid conveyance device C is the same as that of the fluid conveyance device A described in the first embodiment, but in addition to one drive device 100, a plurality of vibration units (hereinafter referred to as vibration units 500). This is different from the fluid transfer device A in that it is provided. In the third embodiment, differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  The fluid conveyance device C is configured to be able to convey a mass of fluid in one or two or more directions simultaneously or with a time difference in the same manner as the fluid conveyance device B according to the second embodiment. is there. As shown in FIG. 7, in the fluid conveyance device C, one driving device 100 and two vibration units 500 are installed in the cabinet 30 in the fluid conveyance direction (front direction). The driving device 100 and the vibration unit 500 are installed with a predetermined distance therebetween. Further, the frame 20 of the driving device is supported not by the fixed end 105 but by the support portion 105 a, and the frames 20 positioned on both ends of the two vibrating portions 500 are supported by the fixed end 105.

  A space in the cabinet 30, that is, a space around the drive device 100 and a space on the drive device 100 side of the vibration unit 500 are referred to as a space 505. Further, the second fixing part 20 b of the frame 20 of the vibrating part 500 is not fixed to the plate 13. The central opening of the frame 20 is referred to as an opening 600. That is, the back surface (surface on the driving device 100 side) of the vibration plate 16 of the vibration unit 500 communicates with the space 505 through the opening 600.

  A vibrating unit 500 shown in FIG. 7 includes a diaphragm 16, a large arc edge 22, and a frame 20. That is, the vibration part 500 is configured by a member obtained by removing the large arc damper from the vibration part provided in the drive device 100 described in the first and second embodiments. By adopting such a configuration, it is possible to realize further cost reduction and weight reduction as compared with the fluid conveyance device according to the first and second embodiments.

  The drive signal as shown in FIG. 2 of the first embodiment is supplied to drive the fluid conveyance device C. Then, with the vibration of the diaphragm 16 of the driving device 100, the pressure in the space 505 passes through the opening 600 of the frame and is transmitted to the diaphragm 16 that is a constituent member of the vibration unit 500. That is, the vibration of the diaphragm 16 of the driving device 100 acts as a pressure wave for driving the diaphragm 16 of the vibration unit 500. As a result, the pressure generated by one drive device 100 can be propagated to each of the vibration units 500 provided in the cabinet 30. Needless to say, the vortex ring can be conveyed even when there is only one vibrating section 500.

  Next, a case where a vortex ring is discharged from the two vibrating parts 500 with a time difference using the fluid conveyance device C will be described. In the configuration illustrated in FIG. 7, all of the plurality of vibration units 500 are simultaneously driven by the vibration generated by the driving device 100. On the other hand, the movement of the diaphragms 16 of the plurality of vibrating parts 500 can be changed by changing the weight of the diaphragm 16 of the vibrating part 500. For example, the increase or decrease in weight may be determined by changing the material and thickness of the diaphragm 16 of the vibration unit 500.

  Further, as shown in FIG. 8, a plurality of acoustic passages (first acoustic passage 508 a and second acoustic passage 508 b) having different path lengths are formed in the cabinet 30, and the diaphragms 16 of the plurality of vibration parts 500 are formed. The movement may be changed. The acoustic path is a path from the driving device 100 formed by being partitioned by a partition member (for example, metal or resin) provided in the space 505 of the cabinet 30 to reach each of the vibration units 500. In FIG. 8, the acoustic path having the path length L1 is illustrated as the first acoustic path 508a, and the acoustic path having the path length L2 is illustrated as the second acoustic path 508b.

  L1 indicates the length from the start center point of the pressure fluctuation generated in the driving device 100 (the point X shown in FIG. 8) to the vibration plate 16 of the vibration unit 500 on the upper side of the drawing. L <b> 2 indicates the length from the start center point X of the pressure fluctuation generated in the driving device 100 to the vibration plate 16 of the vibration unit 500 on the lower side of the drawing. FIG. 8 shows a state where L1 <L2. Thereby, it becomes possible to provide a time difference in the pressure fluctuation reaching the diaphragm 16 of the vibration part 500, and the vibration part 500 can be driven respectively. Therefore, a lump of fluid can be conveyed with a time difference.

  According to such a configuration, the drive signal as shown in FIG. 2 of the first embodiment is supplied using one drive device 100, and the two vibration units 500 are simultaneously or with a time difference. The vortex ring can be discharged to the outside of the cabinet 30 by transmitting. In addition, the lump of fluid can also be conveyed in two or more directions by making the opening direction of the carry-out port 110 into different directions. 7 and 8 exemplify the case where there are two vibration units 500, the number of vibration units 500 is not particularly limited.

  As described above, the embodiments of the present invention have been described separately. However, it is not denied that the features of the embodiments are combined.

  DESCRIPTION OF SYMBOLS 1 Fluid conveyance space, 10 Yoke, 11 Center pole, 12 Magnet, 13 Plate, 14 Voice coil, 15 Voice coil bobbin, 16 Diaphragm, 17 Adhesive layer, 20 Frame, 20a 1st fixing | fixed part, 20b 2nd fixing | fixed part, 20c Tapered part, 21 large arc damper, 22 large arc edge, 30 cabinet, 100 driving device, 103 magnetic circuit part, 105 fixed end, 105a support part, 106 pressurizing space, 107 rear space, 109 partition, 110 unloading port, 120 Aperture, 150 Drive signal processor, 160 Amplifier, 170 Signal generator, 200 Schematic signal waveform, 201 Rising wave component, 202 Falling wave component, 203 Vortex ring creation time component, 204 Braking wave component, 210 Maximum value, 500 Vibration part, 505 space, 508a 1st sound Passage, 508b second acoustic path, 600 opening, A fluid transfer device, B fluid transporting device, C fluid transporting device.

Claims (10)

A driving device that has a diaphragm for applying a conveying force to the fluid and vibrates the diaphragm;
A signal generator for generating a signal for vibrating the diaphragm and sending the signal to the driving device,
The signal generator is
The rising wave component in the positive voltage direction , the falling wave component in the negative voltage direction, and the time including the rising wave component and the falling wave component, the maximum of the rising wave component and the falling wave component One-wave signal created at the creation time, which is the total time with the positive voltage part,
A fluid conveyance device that creates the signal as a waveform of one wave each by a negative voltage braking wave component that is driven for a predetermined time by a voltage of ½ or less in the positive voltage direction. The driving device includes:
A voice coil bobbin connected to the diaphragm and wound with a voice coil acting as an electromagnet;
The diaphragm is
The outer periphery is held by a first elastic member having a radius of 10 mm or more,
The voice coil bobbin
The fluid conveyance device according to claim 1, wherein the outer peripheral surface is held by a second elastic member having a radius of 10 mm or more. The voice coil bobbin
The fluid conveyance device according to claim 2, wherein the fluid conveyance device is connected to the diaphragm via an adhesive layer having viscosity. The driving device includes:
It drives with the frequency below the resonance frequency F0 in the acoustic impedance characteristic when installing in the cabinet holding the said drive device, and the time calculated based on the frequency. Fluid transfer device. The fluid conveyance device according to claim 4, wherein the resonance sharpness Q at the resonance frequency F <b> 0 is 1 or more. A plurality of the driving devices are mounted,
The fluid conveyance device according to any one of claims 1 to 5, wherein the driving devices are individually driven or separately driven. Separately from the drive device, the diaphragm and the first elastic member constitute one set to constitute a vibration part,
The vibrating part is
The fluid as described in any one of Claims 1-6 by which one or two or more are installed in the space of the front direction of the said drive device, and the rear surface side is connected via the acoustic channel with the front side of the said drive device. Conveying device. In what installed two or more said vibration parts,
The fluid conveyance device according to claim 7, wherein each of the acoustic paths has a different path length. The fluid conveyance device according to any one of claims 1 to 8, wherein a conveyance force is applied by the diaphragm, and a gas phase, an ultrafine liquid phase, or an oily material is used as the fluid to be conveyed. . The fluid conveyance device according to claim 9, wherein the oily material is aroma oil.

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